diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index a38354d586..14dce0392c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2008-11-24  Jerome Guitton  <guitton@adacore.com>
+
+	* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Use
+        the frame address in block instead of the return address to
+        locate the mdebug PDR of the frame.
+
 2008-11-21  Joel Brobecker  <brobecker@adacore.com>
 
 	Remove the unused BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK.
diff --git a/gdb/alpha-mdebug-tdep.c b/gdb/alpha-mdebug-tdep.c
index 0089561110..8288a82f38 100644
--- a/gdb/alpha-mdebug-tdep.c
+++ b/gdb/alpha-mdebug-tdep.c
@@ -193,7 +193,7 @@ alpha_mdebug_frame_unwind_cache (struct frame_info *this_frame,
 
   info = FRAME_OBSTACK_ZALLOC (struct alpha_mdebug_unwind_cache);
   *this_prologue_cache = info;
-  pc = get_frame_pc (this_frame);
+  pc = get_frame_address_in_block (this_frame);
 
   /* ??? We don't seem to be able to cache the lookup of the PDR
      from alpha_mdebug_frame_p.  It'd be nice if we could change